Exhaust manifold

[Torgny]

Hi there
I have diesel 6BTA cummins. I wonder how long should exhaust manifolds last . Is it 10 or 15 years.
I hope my English is decent.
Regards Torgny.

 

[John Ags]

i just replaced mine after 18 years but only 450 hours when i noticed an exhaust leak. however the risk is if it corrodes internally without an external sign and sea water exhaust backflows into your turbo side. i think 10 years sounds right